OK, first let's admit, no one can say exactly what will be on the March 26th GAMSAT, but if you were betting . . .

Almost all official GAMSAT materials have a question about pKa/pH, use of logarithms for either dB's or pKa/pH, biology/biochemical flow charts, rate law, fluid mechanics, lens, circuit, torques, kinematics, Gibbs free energy, Ksp, grignard's and the #1 subject above all (drum roll!).... stereochemistry???

In the most recent publication from ACER (practice test 2 published Oct 2010), there are 110 questions in Section 3 (yes, no kidding!) and 13 are on one topic: direct questions about stereochemistry. There is no other single topic that shows up so much. Stereochem is also in each of the other 3 booklets.

If you were looking to brush up on one topic this week, I think you found it. I'm not guaranteeing that there will be 13 questions on stereochem on the weekend, but there has to be some!